OREGON CITY, Ore. -- A Gladstone man is in a hospital fighting for his life after a bar brawl left him with severe head injuries.

Friday night, Bradley Buck had gone to Jin's Restaurant and Lounge on South Beavercreek Road and had gotten into an argument with someone inside.

When Buck went outside to the parking lot, someone punched him just one time in the face. Buck fell on the concrete and cracked his skull, and whoever assaulted him took off, police said.

"How dare anybody think they have the right to do that to anybody? Violence isn't the way to solve anything," Bradley Buck's sister, Deanna Buck, said.

Thursday, Bradley Buck's sister and mother were devastated and furious that whoever sent him to a hospital with a brain injury was still on the loose.

"They said something to him and he turned around, they punched him in the head, he fell back and cracked his skull," Bradley Buck's mother, Kelly Castillo, said.

Jin's owner, Frank Chin, was working that night and said he found Bradley Buck on the ground with a pool of blood under his head.

The police were already on their way, when Chin said he heard that the attackers may have included two guys and one girl, driving a blue car.

"They jump in the car saying, 'Oh, the police are coming, police are coming,' and they all take off," Chin said.

"It's like nobody seems to know anything. It's like everything's hush-hush. But I know someone out there knows something about my son," Castillo said.

Bradley Buck's family said it can't believe more witnesses haven't come forward with tips about the culprits. It said it knows police are doing everything they can, and now it's just praying for a good lead.

"We just hope that someone has a heart and comes forward with the information that we need," Deanna Buck said.

Man Suffers Brain Damage In Bar Assault